Means for gasifying heavy fuel in two-stroke engines



- Oct. '19 ,1926.

L. CQRSI MEANS FOR GASIFYING HEAVY FUEL INTWO-STROKE ENGINES Original Filed June 50, 1922 Patented Oct. 19, 1926.

UNITED STATES PATENT OFFICE.

LUZ [GI CORSI, OF TURIN, ITALY.

MEANS FOR GASIFYING HEAVY FUEL IN TWO-STROKE ENGINES.

Original application filed June 30, 1922, Serial No. 571,913, and in Italy July 9, 1921.

Divided and this application filed November 25, 1924. Serial No. 752247.

This in ention relates fying heavy not volatile fuel in two stroke engines being a division of my U. S. application, Ser. No. 571,913, filed June 30, 1922, and is characterized by the fact that the fuel with the carburetting air is first of all drawn into the crank base through a vaporizer consisting substantially of a conduit parallel to the axis of the engine and arranged between the cylinder walls and the cooling jacket and thereafter through the same vaporizer it is conveyed into the cylinder as soon as the piston uncovers an opening which places the cylinder in communication with the vaporizer. In order to promote the vaporization of the fuel on the entire length of the conduit perforated screens or wire to means for gasi- I gauzes are transversely arranged for the purpose of pulverizing the fuel and at the same time accumulating and distributing inside the conduit the heat absorbed from the hot wall of the cylinder. Moreover, in order to complete the vaporization a grate is secured to the piston deflector, said grate being traversed by the mixture during the scavenging period.

The annexed drawing shows by way of example a constructional form of this invention.

1 is the cylinder of a two stroke engine, 2 is the vaporizer of tubular form arranged parallel to the axis of the engine between the cylinder wall and the cooling jacket 3. This vaporizer communicates at one of its ends through the valve 4 with a carburetter (not shown) and at its other end with the engine crank case 5, and at its central part with the cylinder through the inlet opening 6.

Perforated funnel-shaped screens 7 and 8 are secured to the vaporizer portions ex tending between the valve 4 and the crank case 5 symmetrically with regard to the opening 6. The deflector 9 connected with the piston 10 carries on the side of the opening 6 a grate 11, through which the mixture is forced to pass when flowing from the crank case to the driving cylinder. 12 is the sparking plug.

During the compression stroke, the valve 4 opens thus allowing the mixture to be drawn into the crank case, said mixture passing through the vaporizer is submitted to a preliminary very active pulverization and to an intense heating. During the downward stroke of the piston 10, the valve 4 closes and the mixture, compressed in the crank 6 thus completing the process of vaporiza tion.

What I claim is: 1. In an internal combustion two-stroke engine using heavy fuel, a mixture heater comprising a longitudinal conduit contained directly in the cylinder wall and extending from the crank case to the cylinder head, said conduit constantly communicating at one end with the crank case, an inlet valve provided at the other end of the conduit through which the latter can be connected to a carbureter, the conduit being further provided in an intermediate position with an opening controlled by the piston, through which opening it communicates with the lower cylinder portion.

2. In a two-stroke internal combustion engine, a vaporizer for heavy non-volatile fuel comprising a tube longitudinally disposed along the wall of the engine cylinder and communicatingwith the crank case of the engine, means at one end of the tube for connecting it with a carburetter, an inlet valve at said end, said tube having an intermediateopening controlled by the piston of the engine and through which opening the tube communicates with the head of the engine cylinder when said opening is uncovered by the piston on the outward stroke of the latter, and two series of funnel shaped wire gauze baflles arranged symmetrically in the tube between the valve and intermediate opening and between the latter and the crank case.

3. In a two-stroke internal combustion heavy oil engine, a mixture heater comprising a longitudinal conduit contained directly in the cylinder wall and extending from the crank case to the cylinder head, means at one end of the tube for connecting it with a carburetter, an inlet valve at said end, said tube having an intermediate opening controlled by the piston of the engine through which the conduit communicates with the cylinder portion opposite the c linder head, a deflector in the piston, an a grate fixed to the upper end of said deflector and extendin perpendicular to the wall of the cylinder etween the deflector and the cylinder wall on the side of the inlet opening.

4. In a two-stroke internal combustion engine, a vaporizer for heav non-volatile fuel comprising a tube longitudinally disposed along the wall of the engine cylinder and communicating with the crank case of the engine, means at one end of the tube for connecting it with a carburetter, an inlet valve at said end, said tube having an intermediate opening controlled by the piston of the engine and through which opening the tube communicates with the head of the engine cylinder when said opening is uncovered by the piston on the outward stroke of the latter, and two series of funnel shaped wire gauze bafiies symmetrically arranged in the tube between the valves and the interme diate opening and between the latter and the crankcase, a deflector on the engine piston, and a grate carried by the deflector through'which the fuel mixture is caused to flow before entering the engine cylinder.

In testimony that I claim the foregoing as my invention, I have signed my name.

LUIGI CORSI.

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